Harrow



May 17 1927' J. NoRDs'roG HAnnow y Filed oct. v, 192e 2 sheets-sheet 2L? Z9 T9-@l '3.0 M #rm \\\\\\\\\\\\-Vv 7, 54"l 26 fg 1 af- Patented May17, 1927.

UNITED STATES JOHN Nonns'roc, or caesar,` NORTH DAKOTA.

Hannow.

Application led October 7, 1926. Serial No. 140,140.

This invention relates to harrows and more particularly to a barrow ofthe type shown in my prior patent, granted March 31,

1925, for cultivators, No. 1,531,453.

5 An important object of the invention is to rovide a novel and improvedmeans cont olling the movement of the tooth supporting bars of theharrow to permit control thereof from the tractor element by means l ofwhich the barrow is being drawn over the ground.

A further and more specific object of the invention is to provide acontrol lock, which serves both as a means for causing the tooth l`supporting bars and teeth thereof to move into ground engaging positionand to return the tooth supporting bars and their teeth to theinoperative position.

A further object of the invention is to provide a construction of thischaracter `eliminating the necessity for springs or similar means forshifting the teeth into ground l engaging position.

`These and other objects I attain by the construction shown in theaccompanying drawings, wherein for the purpose of illustration is showna referred embodiment of Iny invention and w ierein Figure 1 is a sideelevation of a barrow constructed in accordance with my invention'Figure 2 is a plan view thereof;

Figure 3 is an enlarged longitudinal sectional view through the forwardend of the barrow;

F igure'll is an enlarged plan view of the control member.`

Referring now more particularly to the drawings, the numeral 10generally designates a frame including runners 11 connected attheirforward ends by a transverse bar 12, the forward ends of theserunners being upturned, as at 13, to facilitate their passage over thegrouno'l.` Each runner is preferably formed from angle-iron and has thestern flange thereof vertically directed. To this flange are pivotedlongitudinally spaced links 14, the ends of which are rigidly connectedto transversely extending tooth supporting bars 15 having removableteeth `16. The bars are so `connected with the links that the teeththereof, when the links are substantially vertically directed,substantially parallel the runners and accordingly the ground over whichthe runners are passing and when the bars are horizontally directed, theteeth are vertically directed and project below the lower faces of therunners for engagement with the ground. The tooth supporting bars 15 areconnected for simultaneous movement from one to the other of thesepositions by a longitudinally extending bar 17 through which each of theparts 16 is rotatably directed.

The structure hereinbefore recited is substantially identical with thatemployed in my prior patent above mentioned. In accordance with thepresent invention, I provide at the center of the front bar 12 atransversely extending horizontal pivot 18 upon which I mount a bellcrank 19 at the angle between the arms 20 and 21 thereof.

`The arm 20,`vvhich is substantially vertically directed, is provided atits free end with a hook 22. .Pivoted at opposite sides of the bill ofthe hook upon a pivot 23 extending through the bill of the hook areplates 24k rigidly connected to one another by rivets extending throughthe plates and through a member 25 providing an ear hav ing an opening26 for the reception of a trip rope. Extending through the hook is a pin27, the ends of which operate in arcuate notches 28 formed in the plates24 to limit the movement of these plates about their pivot. A spring 29is connected with the ear 25 and with the bight 30 of the hook andconstantly urges the plates to a position Where the forward end Walls 31of the notches 2S engage against the ends of the pins 27. Pivoted toopposite sides of the arm 20 are levers 32 having their forward faces attheir upper vends thereof adapted for engagement against shoulders 33 onthe plates 24 when the plates 24 are in their normal position, asdetermined by the spring 29. The rear or lower ends of the levers 32extend upon opposite sides of the forward end -of the bar 17 and areconnected thereto by a pivot 34. The free end of the arm 21 of the bellcrank lever 19 has an opening 35` in which is secured the rear end of adraft cable 36 which is passed through a guide 37 carried by the frontbar to a suitable point of attachment upon the tractor element (notherein illustrated).

lVhen the device is being transported from place to place, the upperends of the levers 32 engage against the shoulders 33, so that theselevers may not move in the direction of the arrow A of Figure 3 abouttheir pivots. Since the pull on the cable 36 ivi-ll` constantly urge theaun-Qt) in the direction otl the arrow B o'lf this igiire,.it

Will be obvious that a lock joint ispro-VV vided, lor in order `tor.the. bail'..ton1ove Vrearwardly and tli-us permit the teeth 1G to engagewith the ground, the lever. 32 must move in the direction ot the arrowA, While the bell crank'. lever moves in'the direction of the arrow B..The n'ioveineiit f oithe lever being prevented, the bell crank lever 19.becomes rigid.` so that the hitch pull `only operates to drag 'Itivatorover the ground upon tlierunnera' 11. In order to nieve the teeth tooperative position, it is merely necessary to twitch the trip ,ropefrengaged in the opening 2G. fliismov/es the plates- 74- to a positionperini/ating escape oitlie tor\vard or upper --ends of the levers '32,so-thatthe piil'l- -exercisecl by Athe lcable 36 mayrotate `the bellcrank 19, positively forcing the bar i l'i'- rear- `Wa-rdly and bringingthe teeth into operaltive position. It is ypointed out that bythisconstruction, the pull exercised upon' the cultivator, when-the teetharo'in ground engagmg p'ositioinserves to forcibly maintain fthe teethinsaid position.

lVlien it is desired to restorethe teeth to inoperative position, 'thetrip rope" is engaged-With the handrand pulled `forwardly until the pins27 engage againstY the rear Walls 38 ot the no tclies28 and AtheseWallsserve to hold the latch rigid to'the bell cranlclever. A con--tinuation otthepull will, therefore, cause 'l the bell crank lever 19and ,more particularly' the arm 2O thereoi to be drawn-forwardly f andupwardly, moving`- the teeth to their in- ,not.to-be or, for somereason, may not be cultivated. lt will, Vot' course, be obvious y that'asuitably supported guide pulley may vloe-provided 'for the trip rope 36,it so der sired. f

Y It ivillalso be obvious that the construetion -hereinbeiore set forthis capable ot a certain .range-oli change ,and inodiiication .Withoutmaterially departingl ronitlie spirit ofthe inventionand Iaecordingly donot limit myself to such speeilic structure except as hereinafterclaimed.

' I claimz- V 1.1 In-a harroiv, a frame including side .membershavingupturned forward lends, a Vcross bar .connecting said forward ends, a

plurality *ofv ylongitudinally spaced links pivotcd to thesideiiieinbers, transveri'ely extending bars to iiliicli the ends otcorreN spending links ol' the side members` are `,rigidly connected,ground ivorlring implements carried by the ti'anm'eisely extending barsand projecting therelroni at an angle to said links, a longitudinalljvextending .bar lconnectzing Athe transverse barca l'or siniiiltaneouslyshifting the naine to move the ground engaging implementsl into or outoit-engagement with lie. ground. a` lever pivoted.intermediate its endslo the eros-s bai'. a second lever pivoted at one end to thelongitudinally extending bai' and interine diate itsienils to one endiolthe lii:-tiiaineil .lever and` a latclrliinitiug relative. rotation ofSaid `levers about the pivotal connection thereot'Uat-Va. pointpositioning the longi-- tiidinalibar to retain the ground noi-hingimplements out ol? engagement with the ground and a draft elementconnected Willi the opposite end ot the liril naiY ed lever.

f2. In a liarroiv. a 'traine including side membershaving-iipturnedforward ends, a .cross bar connecting said lorivai'd ends. a pluralityot'.longitudinally spaced links pivoted to the side members,`transversely extending'bars to `which the ents` oi?corresponding'linl-:s of the side members are rigidlyconnected, gri-unalivorliing `implements carried bythe transversely extending bars andprojecting thereironi atan angle to said links, a longitudinallyextending liar eonnectingtlietransverse bars for eiiniiltaneouslysl'iilting the saine to move the groundengaging implements into or outof engagement iviththe Lground,` a lever piv otedintermediate its endsto the eroiesliar.

a second lever pivoted at one end to the longitudinally extending barand intermediate its endsto one end oltlie tiret nained Aleven-a. llatchlimiting relative rotation ol' plurality ofllongitudinally spaced vlinks`pivoted to t-he sider members, transversely cxtending bars to `whichthe Sends of corresponding links of the side members are rigv idlyconnected,ground Workingr iinplen'ients carried by the transverselyextending bars and projecting therefrom at an angle to said `links, a.longitudinally extending bar connecting the transverse bars forsimiiltanellNl lili-i lli) lill! ously shifting the same to move theground engaging implements into or out of engagement with the ground, alever pivoted intermediate its ends to the cross bar, a second leverpivoted at one, end to the longitudinally extending bar and intermediateits ends to one end of the first named lever, a latch limiting relativerotation of said levers about the pivotal connection thereof at a pointpositioning the longitudinal bar to retain the ground working implementsout of engagement with the ground, a draft element connected with theopposite end of the first named lever, a spring normally maintaining thelatch in operative position, means for withdrawing the latch from itsoperative position, means limiting the withdrawal of the latch, and adraft element for withdrawing the latch, said latch being pivoted to thefirst named lever whereby a pull upon the last named draft elementexercises a pull moving the latch to inoperative position andsubsequently shifting the first named lever to thereby shift the secondnamed lever and said longitudinally extending bar to move the groundworking implements to inoperative position.

4. In combination with a harrow including a frame, a plurality of groundworking implements carried thereby and movable into or out of engagementwith the ground, a member movable longitudinally of the harrowcontrolling the ground working implements in their movement, a draftelement, a connection 'between the draft element and member wherebyduring the application of strain to the draft element the member isurged to a position where the ground working implements engage theiround, said connection including a lever plvoted intermediate its endsto the frame, a second lever pivoted intermediate its ends to one end ofthe first named lever and at its rear end to the` forward end of saidmember, a latch pivotedto said end of the first named lever and normallyspring-positioned in the path of the forward end of the last named leverand means for withdrawing the latch and for exercising upon said end ofthe first named lever a pull to thereby shift the ground workingimplements out of engagement with the ground, the opposite end of thefirst named lever being adapted for connection with a draft element.

5. In a harrow, a frame adapted to move over the ground, a plurality ofground w0rk ing implements carried by the frame and movable into and outof engagement with the ground, a longitudinally extending bar carried bythe frame and having connection with the ground working implementscontrolling thcm in their movements, a lever pivoted intermediate itsends to the frame, a second lever pivoted at one end to thelongitudinally extending bar and intermediate its ends to one end of thefirst named lever and a latch limiting relative rotation of said leversabout the pivotal connection thereof at a point positioning thelongitudinal bar to retain the ground working implements out ofengagement with the ground and a connection between the opposite end ofthe first named lever and a draft element.

6. In a barrow, a frame adapted tov moveV over the ground, a pluralityof ground working implements carried by the frame and `movable info andout of engagement with the ground, a longitudinally extending barcarried by the frame and having connection with the ground workingimplements con trolling them in their movements, a lever pivotedintermediate its ends to the frame, a second lever pivoted at one end tothe longitudinally extending bar and intermediate its ends to one end ofthe first named lever, a latch limiting relative rotation of said leversabout the pivotal connection thereof at a point positioning thelongitudinal bar to retain the ground working implements out ofengagement with the ground, a connection between the opposite end of thefirst named lever and a draft element. and means continuously operableto initially withd raw tbe latcli and subsequently exercise a pull uponthe first named end of the first named lever to thereby move said leverin a direction drawing the ground working .implements out of engagementwith the ground.

In testimony whereof I hereunto affix my signature.

JOHN NORDSTOG,

